JP2780073B2 - Evacuation door - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an escape door used in an emergency such as a fire.

[0002]

2. Description of the Related Art According to the Building Standards Act and the Fire Service Law, it is mandatory to install mechanical smoke exhaust equipment in buildings, and in the event of a fire, smoke is emitted outside to facilitate evacuation of people. As an example of the equipment, a smoke exhaust fan is installed. On the other hand, evacuation stairs are provided, and evacuation doors leading to them are provided in rooms and the like.

[0003] When a fire occurs, the smoke exhaust fan is operated to discharge indoor smoke to the outside and escape from the evacuation door to the outside.

[0004]

When the smoke exhaust fan is operated with the doors and windows closed and the indoor smoke is exhausted, there is no inflow of outside air corresponding to the amount of exhaust, so that a negative pressure is applied to the entire indoor space. And the evacuation door is also under negative pressure. As a result, at the time of evacuation, for example, a force of 20 kg or more is applied in the direction of closing the door, and it becomes difficult to open the evacuation door with the force of a weak person such as a woman.

An object of the present invention is to solve the disadvantages of the prior art and provide an evacuation door that can be opened smoothly with a small force even when the room is in a negative pressure state by operating a smoke exhaust fan during an emergency evacuation. To provide.

[0006]

In order to achieve the above object, the present invention firstly provides an evacuation door provided in a room provided with a smoke exhaust fan, wherein an electromagnet is provided on a door frame, and a door at a position facing the electromagnet is provided. The gist is to attach a permanent magnet to the main body and to generate a repulsive force between the permanent magnet and the electromagnet when the evacuation is performed.

[0007] Second, the electromagnet is energized in conjunction with the operation of the smoke exhaust fan.

Third, the repulsive force generated between the electromagnet and the permanent magnet is set to the extent that assists the door opening by human power.

[0009]

According to the first aspect of the present invention, during evacuation,
When the electromagnet is energized, a repulsive force is generated between the electromagnet and a permanent magnet provided on the door, whereby a force in the opening direction acts on the door. Therefore, when the door is pushed in the opening direction, the door opens smoothly with a small force.

According to the second aspect of the present invention, in addition to the above-described operation, the electromagnet is energized in conjunction with the operation of the smoke exhaust fan. It works and ensures safety.

According to the third aspect of the present invention, in addition to the above operation, the repulsive force generated between the electromagnet and the permanent magnet is set to such a level as to assist the door opening by human power. The door is safe because it does not open automatically and does not stay open.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a vertical sectional side view of a main part showing an embodiment of an evacuation door of the present invention, FIG. 2 is an explanatory view of a vertical side of a room in which the door is installed and a staircase, and FIG. , Room 1
Has a smoke outlet 3 on the ceiling 2 as mechanical smoke exhaust equipment,
A smoke exhaust fan 5 is disposed in an exhaust duct 4 which opens to the smoke outlet 3 and communicates with the outside.

In the figure, reference numeral 6 denotes, for example, a staircase for emergency evacuation, and an evacuation door 7 separates the staircase 6 from the room 1. The evacuation door 7 includes a door frame 7a and a door body 7b which is openably and closably combined with the door frame 7a. An electromagnet 8 is provided on the upper portion of the door frame 7a, and the door body 7b at a position facing the electromagnet 8 is provided. Is provided with a permanent magnet 9. The electromagnet 8 and the permanent magnet 9
Means N so that they are mutually sucked in a non-energized state.
Pole and S pole are set.

Then, the electromagnet 8 is connected to the smoke exhaust fan 5 via the interlocking wiring 11 via the control device 10, and is connected to the smoke exhaust fan 5.
The electromagnet 8 is configured to be energized in conjunction with the operation of. The repulsive force generated between the electromagnet 8 and the permanent magnet 9 when the electromagnet 8 is energized is set to, for example, about 5 kg so that the evacuation door 7 does not automatically open.

Next, the operation will be described.
The electromagnet 8 is not energized, and the electromagnet 8 and the permanent magnet 9 are not in a repulsive state. The electromagnet 8 and the permanent magnet 9 are opened and closed by the same touch as a door on which the electromagnet 8 and the permanent magnet 9 are not installed.

When the smoke exhaust fan 5 is actuated in an emergency such as a fire, the control device 10 operates to energize the electromagnet 8 in conjunction therewith, and a repulsive force of about 5 kg is applied between the electromagnet 8 and the permanent magnet 9. Occurs. In this case, with a repulsive force of about 5 kg, the evacuation door 7 does not open automatically but remains closed.

On the other hand, when the air in the room 1 is exhausted as smoke from the exhaust port 3 by the operation of the exhaust fan 5, the room is in a negative pressure state, and the evacuation door 7 is also applied with a negative pressure of about 20 kg. In this state, if a force in the opening direction is applied to the evacuation door 7 by human power, a repulsive force of about 5 kg has already been applied to the main body 7b of the evacuation door 7 and the door frame 7a as described above. The evacuation door 7 can be easily opened even by a weak person.

If the evacuation door 7 is slightly opened (for example, several centimeters), outside air flows into the room 1 from the staircase room 6 side, so that the negative pressure in the room 1 drops at a stroke. The evacuation door 7 can be further opened with a slight force without relying on the repulsive force of the electromagnet 8 and the permanent magnet 9.

In this way, the room 1 escapes to the staircase room 6 and evacuates. After evacuation, the evacuation door 7 is automatically closed by a generally provided door closer, and does not remain open.

Further, by setting the exciting current to the electromagnet 8 variably for each evacuation door 7 by the control device 10, it is also possible to adjust the electromagnetic repulsion force corresponding to the installation conditions for each evacuation door 7. .

[0021]

As described above, the evacuation door of the present invention can be opened smoothly with a small force even if the room is in a negative pressure state by operating the smoke exhaust fan during emergency evacuation. It is possible to make sure that the escape from the vehicle can be ensured and to enhance the safety.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a main part showing an embodiment of an evacuation door of the present invention.

FIG. 2 is an explanatory view of a room in which an evacuation door according to the present invention is installed and a vertical side surface of a staircase.

FIG. 3 is an explanatory view on a plane side of a room in which an evacuation door of the present invention is installed and a staircase room.

[Description of Signs] 1… Room 2… Ceiling 3… Smoke exhaust port 4… Exhaust duct 5… Smoke exhaust fan 6… Staircase room 7… Evacuation door 7a… Door frame 7b… Door body 8… Electromagnet 9… Permanent magnet 10… Control device 11… Interlocking wiring

Claims (3)

(57) [Claims] 1. An evacuation door provided in a room provided with a smoke exhaust fan, an electromagnet is provided on a door frame, a permanent magnet is attached to a door body at a position opposed to the electromagnet, and the electromagnet is energized at the time of evacuation to establish a connection with the permanent magnet. An evacuation door characterized by generating a repulsive force in between. 2. The evacuation door according to claim 1, wherein the electromagnet is energized in conjunction with the operation of the smoke exhaust fan. 3. The evacuation door according to claim 1, wherein the repulsive force generated between the electromagnet and the permanent magnet is set to such a level as to assist the door opening by human power.